This type of routine is used by both experienced powerlifters and beginners. I believe that it is great for beginners because they don't know their bench pressing weaknesses yet and they need work on their form. It also gives them the opportunity to try many grips and bench 2 to 3 times per week. It is as simple as the sport of powerlifting itself.

On the 9th week take day 1 off and find a new 1 rep max on day 2. You can repeat this cycle or try a new workout at the beginning of the next week. If you completed this going only twice a week, I would recommend trying it 3 times per week before trying a new workout.